wfq.h

c＋＋编写的ns环境下关于wfq算法的仿真源代码

/*
 * Copyright (c) 1999-2000 Paolo Losi ([e-mail])
 *
 * Copyright (c) 2001-2005 Paolo Losi ([e-mail])
 *                         Alexander Sayenko ([e-mail])
 *
 * All rights reserved
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */


#include "wfq-list.h"
#include "math.h"
#include "queue.h"
#include "wfqclassifier.h"


class WFQ;

/*
 * This class is needed to handle events in the GPS reference system
 */
class GPSHandler : public Handler {
	public:
		GPSHandler(WFQ *queue) : q(queue){};
		void handle(Event *e);
	protected:
		WFQ* q;
};

/*
 * This class represents the WFQ scheduler
 */
class WFQ : public Queue {
  public:
    WFQ();

    virtual int command(int argc, const char*const* argv);

    Packet *deque(void);
    void enque(Packet* pkt);
    void handle(Event *);

  protected:
    void scheduleGPS();
    void updateSum ();

    GPSHandler GPS_hand;
    Event*     GPS_event;       /* this is the event corresponding to the end
                                   of the tx in the GPS reference system */
    int idle;                   /* whether GPS reference system is idle */ 
    double virt_time;
    double last_vt_update;      /* last virt_time update time */

    double sum;                 /* sum of weights of the activ queues */

    WFQAggregClassifier *wfq_classifier;
		
    List<int> GPS_queueID_l;    /* queueID list for GPS refer. system */
    List<Packet *> PGPS_pack_l; /* Packet list for PGPS system */	

    double bandwidth;           /* bandwidth of the output link */

};

/*
 * Interface to NS-2 object hierarchy
 */
static class NS2WFQ : public TclClass {
  public:
    NS2WFQ() : TclClass("Queue/WFQ") {};

    TclObject* create(int, const char*const*) 
      { return (new WFQ); }
} class_wfq;